Flies expressing Brd^Scer\UAS.cLa under the control of Scer\GAL4^sca-537.4 show defects in the adult peripheral nervous system, including tufting (multiplication) of many head macrochaetae and some notum macrochaetae, frequent doubling or mild tufting of up to a third of notum microchaetae and mild increases in the density of microchaetae. Flies expressing high levels of Brd^Scer\UAS.cLa under the control of Scer\GAL4^ey.PS show strong defects in ommatidial assembly and organisation, showing substantial ommatidial fusion and lens pitting in the eye. Flies expressing Brd^Scer\UAS.cLa under the control of Scer\GAL4^GMR.PF have strongly roughened eyes with defects that include tufting of interommatidial bristles and excess photoreceptors. Expression of Brd^Scer\UAS.cLa under the control of either Scer\GAL4^Bx-MS1096 or Scer\GAL4^69B does not appear to alter wing vein fates or the overall integrity of the wing margin, although sensory organ fates in each of these territories are altered.